<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>

		<p id="demo">七里香</p>

		<button onclick="myFunction()">点我<tton>
				<script>
					function myFunction() {
						document.querySelector("#demo").innerHTML = "窗外的麻雀在电杆上多嘴";
					}
				</script>

	</body>
</html>
